Which of the following hydrocarbons has the highest normal boiling
1.butene
2.ethene
3.pentene
4.propene

Option (3) is the correct answer.

Explanation:

It is known that more is the carbon atoms attached linearly into a molecule more will be the boiling point of the molecule.

Also, more is the branching in a molecule, less will be the boiling point of atom.

Therefore, out of the given options pentene has highest number of carbon atoms, hence, pentene has the highest normal boiling point.

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.